medulla

名词 medulla:

1. a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers
   同义词：myelin, myeline
2. lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)
   同义词：medulla oblongata, bulb
3. the inner part of an organ or structure in plant or animal

me.dul.la

n.（名词）
【复数】 me.dul.las 或 me.dul.lae [-dôl.ô]
The inner core of certain organs or body structures, such as the marrow of bone.
髓质：某些器官或身体结构的内部或深部，如骨髓
The medulla oblongata.
延髓
See myelin
参见 myelin
Botany
【植物学】
The pith in the stems or roots of certain plants.
木髓：某些植物茎或根中之髓质
The central portion of a thallus in certain lichens and red or brown algae.
菌髓：某些地衣和红色或棕色藻类之叶状体的中心部分

来源：
Middle English
中古英语
from Latin
源自 拉丁语
perhaps alteration influenced by medius [middle] * see medial
可能为 受 medius的影响 [中间的] *参见 medial
of *merulla
*merulla的变化

【引伸】
medul.lar 或
med.ullar.y